Description
Series 740 safety and relief valve is engineered for heavy-duty industrial usage. Multiple purpose safety and relief valve for all services: Liquid, Steam and Air/Gas. ASME and National Board Certified for Section XIII “UV” for ASME Section VIII Div. 1 service as well as CE and CRN Certifications. Pressures are to 1500 psig. Available with the full array of metal and seating options. Usages Pressure Vessels, Pumps, Hydraulics, Tanks, Steam Systems, Chemical, Cryogenic, Air and Gas Compressors, Separators, by-pass and over pressure protection. Choose for most industrial applications requiring a safety relief valve.
Specifications
| Pressure Range | 350 psig (740 air/liquid), 1500 psig (741-743 air/liquid), 250-300 psig (steam) |
|---|---|
| Temperature Range | -320°F to 800°F (varies by series) |
| Certifications | ASME Section VIII, National Board, CE, CRN |
| Connection Types | NPT Male × Female, NPT Female × Female, BSPT, BSPP, Tri-Clamp Inlets, Lap Joint Flanges (741/742/743), AS5202, VCR |
| Materials | 740: Brass nozzle, SS ring/disc/springs, Brass/bronze body, 741: SS nozzle/ring/disc/springs, Brass/bronze body, 742: SS nozzle/ring/disc/all internals/springs, Carbon steel body, Custom materials available including Hastelloy, Monel, and 6 Moly, 743: SS nozzle/ring/disc/all internals/springs, Stainless steel body |
PDF Documents
743 Tri-Clamp Cut SheetOpens in new window
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743 Flanged Cut SheetOpens in new window
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743 Cut SheetOpens in new window
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742 Flanged Cut SheetOpens in new window
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741 Cut SheetOpens in new window
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740 Series CatalogOpens in new window
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740 Capacity Certifications (Air & Steam)Opens in new window
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740 Capacity Certifications (Liquid)Opens in new window
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Aquatrol Main CatalogOpens in new window
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Lift Lever OptionsOpens in new window
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Installation & Maintenance ASMEOpens in new window
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